7641145 has 4 divisors (see below), whose sum is σ = 9169380. Its totient is φ = 6112912.

The previous prime is 7641133. The next prime is 7641197. The reversal of 7641145 is 5411467.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4372281 + 3268864 = 2091^2 + 1808^2 .

It is a cyclic number.

It is not a de Polignac number, because 7641145 - 2⁵ = 7641113 is a prime.

It is a super-2 number, since 2×7641145² = 116774193822050, which contains 22 as substring.

7641145 is a lucky number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 764110 + ... + 764119.

It is an arithmetic number, because the mean of its divisors is an integer number (2292345).

Almost surely, 2^7641145 is an apocalyptic number.

It is an amenable number.

7641145 is a deficient number, since it is larger than the sum of its proper divisors (1528235).

7641145 is a wasteful number, since it uses less digits than its factorization.

7641145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528234.

The product of its digits is 3360, while the sum is 28.

The square root of 7641145 is about 2764.2621076881. The cubic root of 7641145 is about 196.9636787032.

The spelling of 7641145 in words is "seven million, six hundred forty-one thousand, one hundred forty-five".